Link downloads to directories, not files

Author: hylkevds

README.md

@@ -9,10 +9,10 @@ is the first complete, open-source official reference implementation of the [OGC
 
 ## Downloading
 
-Instead of compiling the server yourself, you can also download pre-built war and jar files from:
-* [FROST-Server.MQTTP](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.MQTTP/2.1.0/FROST-Server.MQTTP-2.1.0.war)
-* [FROST-Server.HTTP](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.HTTP/2.1.0/FROST-Server.HTTP-2.1.0.war)
-* [FROST-Server.MQTT](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.MQTT/2.1.0/FROST-Server.MQTT-2.1.0-jar-with-dependencies.jar)
+Instead of compiling the server yourself, you can also download pre-built war and jar files from Maven Central:
+* [FROST-Server.MQTTP](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.MQTTP/) FROST-Server.MQTTP-x.y.z.war
+* [FROST-Server.HTTP](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.HTTP/) FROST-Server.HTTP-x.y.z.war
+* [FROST-Server.MQTT](https://repo1.maven.org/maven2/de/fraunhofer/iosb/ilt/FROST-Server/FROST-Server.MQTT/) FROST-Server.MQTT-x.y.z-jar-with-dependencies.jar
 
 Or you can [use Docker](https://fraunhoferiosb.github.io/FROST-Server/deployment/docker.html).